var last_layer = "";
var hide_layer = "";
var timerID = 0;


function hidelayer ()
{	
	if (last_layer != "")
		CSSetStyleVis (last_layer, 0);
	last_layer ="";
	reset_timer();
}

function hide_layer_slow()
{
	timerID = setTimeout("hidelayer()", 1000);
}

function reset_timer()
{
	if(timerID) {
      clearTimeout(timerID);
      timerID  = 0;
   }
}


function show_layer (basename, nr, on)
{
	var name = basename+nr;
	var obj = document.getElementById(name);
	if (last_layer != "")
		CSSetStyleVis (last_layer, 0);
	if (on)
	{
		CSSetStyleVis (name, on);
		last_layer = name;
	}
	
	//obj.style.display = (on)? "block": "none" 
}



function show_class (nr, classname)
{
	var name = "menu"+nr;
	var obj = document.getElementById(name);
	obj.className = classname;
	/*
	if (on)
		obj.className = classname; //"menuhover";
	else
		obj.className = "menu";
	*/
}